1521156036 has 48 divisors (see below), whose sum is σ = 3745324800. Its totient is φ = 479188512.

The previous prime is 1521156011. The next prime is 1521156059. The reversal of 1521156036 is 6306511251.

It is a junction number, because it is equal to n+sod(n) for n = 1521155994 and 1521156012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87571 + ... + 103493.

It is an arithmetic number, because the mean of its divisors is an integer number (78027600).

Almost surely, 2^1521156036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1521156036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1872662400).

1521156036 is an abundant number, since it is smaller than the sum of its proper divisors (2224168764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1521156036 is a wasteful number, since it uses less digits than its factorization.

1521156036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16368 (or 16366 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1521156036 is about 39002.0004102354. Note that the first 3 decimals coincide. The cubic root of 1521156036 is about 1150.0708301679.

Adding to 1521156036 its reverse (6306511251), we get a palindrome (7827667287).

The spelling of 1521156036 in words is "one billion, five hundred twenty-one million, one hundred fifty-six thousand, thirty-six".